B. Mecrow, J. Bennett, A. Jack, D. Atkinson, A. Freeman
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Very high efficiency drives for solar powered unmanned aircraft
Solar powered aircraft require electric drives for the main propulsion system. It is critical that these drives provide both very high efficiency and low mass. This paper describes a permanent magnet machine drive, developed specifically for this application. The machine uses 6% silicon steel laminations to achieve very low iron loss, combined with a high pole number to minimize mass. The system has been developed to maximize efficiency, taking into account both power electronic and motor losses.
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